/Engine/Source/Runtime/MovieScene/Public/EntitySystem/IMovieSceneTaskScheduler.h
Add a child to the back of a previously created 'forked' task. Used for defining 'PostTask' work
void AddChildFront ( [FTaskID](API\Runtime\MovieScene\EntitySystem\FTaskID) Parent, [FTaskID](API\Runtime\MovieScene\EntitySystem\FTaskID) Child )